当应用程序一天不活动时，GCM 推送通知不会出现在 iPhone 上

Posted 2023-02-23

【中文标题】当应用程序一天不活动时，GCM 推送通知不会出现在 iPhone 上

【英文标题】：GCM Push Notifications are not coming on iPhone when app is not active for one day

【发布时间】：2017-06-07 08:28:00

【问题描述】：

在 iPhone/iPad 上安装应用后，应用可以第一时间收到通知。一旦应用程序处于非活动状态，它就会停止在前台和后台收到通知。

有人可以指出，我错过了什么。自从我第一次收到以来，消息格式似乎没有问题。

服务器代码：

            message.put("priority", "high");
            message.put("content_available",true);
            if (to != null)
            
                message.put("to", to.replace("\\", ""));
            
            if (messageId != null)
            
                message.put("message_id", messageId);
            
            JSONObject subobj = new JSONObject();
            subobj.put("sound", "default");
            message.put("notification", subobj);

            message.put("data", payload);
            if (timeToLive != null)
            
                message.put("time_to_live", timeToLive);
            
            if (delayWhileIdle != null && delayWhileIdle)
            
                message.put("delay_while_idle", true);
            
            if (collapseKey != null)
            
                message.put("collapse_key", collapseKey);
            
            message.put("delivery_receipt_requested", true);

客户代码：

     - (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

// First run Delete keychain

if (![[NSUserDefaults standardUserDefaults] objectForKey:@"FirstRun"]) 
    // Delete values from keychain here

    application.applicationIconBadgeNumber = 0;

    [self resetKeychain];
    [[NSUserDefaults standardUserDefaults] setValue:@"1strun" forKey:@"FirstRun"];
    [[NSUserDefaults standardUserDefaults] synchronize];


self.viewController = [[MainViewController alloc] init];


CGRect screenBounds = [[UIScreen mainScreen] bounds];

#if __has_feature(objc_arc)
    self.window = [[UIWindow alloc] initWithFrame:screenBounds];
#else
   self.window = [[[UIWindow alloc] initWithFrame:screenBounds] 
autorelease];
#endif
self.window.autoresizesSubviews = YES;
//notification

[self updateDurationLabel];
UIFont *font = [UIFont boldSystemFontOfSize:10.0f];
NSDictionary *attributes = [NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName];
[self.segFromStyle setTitleTextAttributes:attributes forState:UIControlStateNormal];
[self.segToStyle setTitleTextAttributes:attributes forState:UIControlStateNormal];

[self flowManager];


UILocalNotification *remoteNotification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if (remoteNotification) 
    application.applicationIconBadgeNumber = 0;
    self.launchNotification = remoteNotification.userInfo;

    NSLog(@"NotificationCheck: remoteNotification");



UILocalNotification *localNotification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];

if (localNotification) 
    application.applicationIconBadgeNumber = 0;
    NSLog(@"NotificationCheck: localNotification");

    self.launchNotification = localNotification.userInfo;

    NSData* jsonData = [NSJSONSerialization dataWithJSONObject:localNotification.userInfo options:0 error:nil];
    NSString* jsonString = [[NSString alloc] initWithBytes:[jsonData bytes] length:[jsonData length] encoding:NSUTF8StringEncoding];

    NSLog(@"Dict:%@", jsonString);
      
[self.window makeKeyAndVisible];

return YES;

【参考方案1】：

您可以参考此thread，其中建议将"priority": "high" 添加到JSON 以在后台获取通知。

  "to" : "token...",
  "priority": "high",
  "notification" : 
    "title": "GCM TITLE",
    "body" : "FROM GCM",
    "badge": "1",
    "sound": "default"
  

其他参考资料：

GCM push notification to ios with content_available (not working to invoke from inactive state) GCM support for ios application when application in background or killed Making GCM work for iOS device in the background

【讨论】：

感谢您的回复。我确实已经设置了 priority 和 content_available 标志。 [message.put("优先级", "高"); message.put("content_available",true);] 代码中唯一缺少的标志是'badge'，让我试试运气。